Now, to the latest on that deadly trainccident that devastated a small town in canada. The death toll is rising. And dozens are still missing. Yet this morning, we're learning one amazing survivor story. Abc's gio benitez has that story for us. Reporter: This morning, even as investigators look for remains of the nearly 50 people missing, they are also focusing on what caused that runaway train to burst into flames. The lead investigator now says the type of tanker, which is also common in the u.S., Is known to puncture. The monstrous blaze that destroyed much of downtown here began just after the parked rain rolled down a hill early saturday morning, landing just feet away from this packed bar. The musi cafe. The musical heart of this small town. We see a big wall of fire. And just tried to escape after that. Reporter: Bernard says he escaped only because he went outside for a cigarette. The first time that smoking a cigarette gives you life. Reporter: Look at this image of the area before the blast. Now, look at it today. The block unrecognizable. What happened to the other people in that bar? I seen they don't have time. Many people don't have time to escape. Reporter: Luc had just stepped outside. You were running? Yes. Reporter: This morning, he said there's no way the friends he left in that bar could have survived. And you know your friends -- yes. Reporter: Died? Oh, certainly, eight. Yeah. Reporter: This morning, so many calling this the train from hell. Investigators right now are trying to identify the bodies. But, robin, they can only rely on dna.

This transcript has been automatically generated and may not be 100% accurate.

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